pollution and farming

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Across
  1. 2. things that we use to live, natural or industrial
  2. 3. another word for farming
  3. 7. a law that is designed to control air pollution
  4. 8. our earth's protection from the sun that has a whole in it
  5. 14. the number of people in a certain place
  6. 15. something that is fit for growing food on
  7. 16. the earth is getting warmer because of us
  8. 17. a way of farming that helps during droughts
  9. 18. things that pollute
Down
  1. 1. the reason for climate change
  2. 4. cars, planes and trains are all examples
  3. 5. gases- Gases that pollute our earth very much
  4. 6. a biological community of organisms and their physical envoirnment
  5. 7. to keep something t he same or keep it for a long time
  6. 9. the draining away of water from a surface of land
  7. 10. things that pollute a lot and will eventually run out like coal
  8. 11. when a rock layer moves
  9. 12. the cultivation of aquatic plants for food
  10. 13. a lack of water in a place
  11. 19. very dirty air because of pollution